Alloy



UNITED STATES ,PAT NT- FICEO DANIEL OHARA, DANIEL-W. ELDREDGE, AND JOHN LOGAN, OF WALTHAM, MASSACHUSETTS.

ALLOY.

SPECIFICATION forming part of Letters P atent No. 385,951, dated July 10, 1888.

Xpplication filed March 2, 1888. Serial No. 265,931. (No specimens.)

To all whom it may concern/r portions above specified, but may vary the Beit known that we, DANIEL O HARA, DAN. same within reasonable limits without depart- IEL W-ELDREDGE, and JOHNLOGAN, of Waling from the spirit of our invention. I than), in the county of Middlesex and State of We claimuseful Improvements in Alloys, of 'which the platinum, copper, nickehand goldfln aboutthe following is a specification. iollowing proportiQns,viz: p1atinum,sixty-two Our invention has for its object to provide an parts; copper, twenty-four parts; nickel, eight alloy or compound metal which shall be practiparts, and gold, six parts, as set forth.

a suitable coefficient of expansion; to adapt, it namesto this specification, in the presence of. for use as a material for one of the parts of the two'subscribing witnesses, this 28th day ofFeb iim of a compeusationrbalence for watches or ruary, A. D. 1888.

. chronometers. i 5 Our improved alloy consists in ecompound of platinum, copper, nickel, and gold in about I thefollowing proportions iz: platinum, sixty-. vj N LOGAN" 7 two (62) parts; copper, twenty-four (24) parts; Witnesses: nickel, eight (8) parts; gold, six (6) parts. HENRY N. FISHER,

20 We do not limit ourselves to the ex'act 'pro; EDWARD A. MARSH.

5 Massachusetts, have invented certain new and An alloy or compound metal composed oi" z 5 I 10 callynon-magnetic,inoxidizablqafifiwillhave In testimony whereof we have 'signedour o- 

